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Aroostook Hills

Ecoregion in Appalachian Mountains, ME

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The climate, terrain, and other characteristics of the Aroostook Hills ecoregion are intermediate between those of Ecoregion 58v to the west and Ecoregion 82a to the east. It is a region of plains with hills, with elevations mostly 600 to 1000 feet, with some higher peaks. Mt. Chase is an atypical high point at 2440 feet. Spruce-fir and northern hardwoods are common, and the forests are more temperate and diverse than in the hillier, more boreal Ecoregion 58 to the west. The forest habitat diversity is also affected by the region’s geologic variability. The geology consists mostly of weakly metamorphosed pelite, sandstone, and conglomerate, with some calcareous rocks. Smaller areas of metavolcanic rocks and quartz diorite plutons also occur. A moderate number of lakes and peatlands occur in the Aroostook Hills. Eccentric bogs and concentrically patterned raised bogs reach their western limit in Maine within this ecoregion.

— EPA

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